It is such a zeal for the truth of their religion that has inspired the Muhammadans to carry with them the message of Islam to the people of every land into which they penetrate, and that justly claims for their religion a place among those we term missionary. It is the history of the birth of this missionary zeal, its inspiring forces and the modes of its activity that forms the subject of the following pages. The 200 millions of Muhammadans scattered over the world at the present day are evidences of its workings through the length of thirteen centuries. The doctrines of this faith were first proclaimed to the people of Arabia in the seventh century, by a prophet under whose banner their scattered tribes became a nation; and filled with the pulsations of this new national life, and with a fervour and enthusiasm that imparted an almost invincible strength to their armies, they poured forth over three continents to conquer and subdue. Syria, Palestine, Egypt, North Africa and Persia were the first to fall before them, and pressing westward to Spain and eastward beyond the Indus, the followers of the Prophet found themselves, one hundred years after his death, masters of an empire greater than that of Rome at the zenith of its power. Although in after years this great empire was split up and the political power of Islam diminished, still its spiritual conquests went on uninterruptedly. When the Mongol hordes sacked Baghdād (A.D. 1258) and drowned in blood the faded glory of the ʻAbbāsid dynasty,—when the Muslims were expelled from Cordova by Ferdinand of Leon and Castile (A.D. 1236), and Granada, the last stronghold of Islam in Spain, paid tribute to the Christian king,—Islam had just gained a footing in the island of Sumatra and was just about to commence its triumphant progress through the islands of the Malay Archipelago. In the hours of its political degradation, Islam has achieved some of its most brilliant spiritual conquests: on two great historical occasions, infidel barbarians have set their feet on the necks of the followers of the Prophet,—the Saljūq Turks in the eleventh and the Mongols in the thirteenth century,—and in each case the conquerors have accepted the religion of the conquered. Unaided also by the temporal power, Muslim missionaries have carried their faith into Central Africa, China and the East India Islands.